2013 ANSYS, Inc. May 21, 2013 1 Release 14.5

Workshop 1: Basic Magnetostatic Analysis

ANSYS Maxwell 2D V16

2013 ANSYS, Inc. May 21, 2013 2 Release 14.5

About Workshop

Force calculation in Magnetostatic Solver

This workshop will discuss how to set up a force calculation in the 2D Magnetostatic Solver.

Problem Description

As shown in the following picture, a coil and slug are drawn in a plane using RZ symmetry. The coils carry a current that exert a vertical force on the ferromagnetic slug.

Actual 3D Coil and Slug 2D Symmetric Coil and

Slug about z-axis

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Problem Setup

Create Design

Select the menu item Project Insert Maxwell 2D Design, or click on the icon

Set Solution Type

Select the menu item Maxwell 2D Solution Type

Solution Type Window:

1. Geometry Mode: Cylindrical about Z

2. Choose Magnetic > Magnetostatic

3. Click the OK button

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Create Model

Create Slug Select the menu item Draw Rectangle

1. Using the coordinate entry fields, enter the position of rectangle

X: 0, Y: 0, Z: -10, Press the Enter key

2. Using the coordinate entry fields, enter the opposite corner

dX: 5, dY: 0, dZ: 15, Press the Enter key

Change the name of resulting sheet to Slug and color to Gray

Change the material of the sheet to Steel_1008

Create Coil Select the menu item Draw Rectangle

1. Using the coordinate entry fields, enter the position of rectangle

X: 6, Y: 0, Z: 0, Press the Enter key

2. Using the coordinate entry fields, enter the opposite corner

dX: 4, dY: 0, dZ: 20, Press the Enter key

Change the name of resulting sheet to Coil and color to Brown

Change the material of the sheet to Copper

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Define Region

Create Simulation Region

Select the menu item Draw Region

In Region window,

1. Pad all directions similarly: Checked

2. Padding Type: Percentage Offset

3. Value: 100

4. Press OK

You should see a message indicating that the X direction is set to zero due to RZ-symmetry about the Z-axis.

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Assign Excitations

Assign Excitations

Select the sheet Coil from history tree

Select the menu item Maxwell 2D Excitations Assign Current

Name: Current1

Value: 1000

Ref. Direction: Negative (current will be in the negative Y direction)

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Assign Boundary and Parameter

Assign Boundary to Region Edges

Select the object Region from history tree

Select the menu item Edit Select All Object Edges

Select the menu item Maxwell 2D Boundaries Assign Balloon

In Balloon Boundary window,

Press OK

Note: On symmetry axis, Balloon Boundary assignment is automatically skipped, This can also be achieved by selecting the edges of region which are not on symmetry axis.

Assign Force Calculation

Select the object Coil from history tree

Select the menu item Maxwell 2D Parameters Assign Force

In Force Setup window,

Press OK

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Analyze

Create an analysis setup:

Select the menu item Maxwell 2D Analysis Setup Add Solution Setup

Solution Setup Window:

1. General Tab

Maximum Number of Passes: 15

2. Click the OK button

Start the solution process:

Select the menu item Maxwell 2D Analyze All

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Solution Data

View Solution Information

Select the menu item Maxwell 2D Results Solution Data

To View Convergence

Select the Convergence tab

To View Calculated Force Value

Select the Force tab

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Create Field Plot

Plot Magnetic Flux Density

Expand the history tree for Planes

Select the plane Global:XZ

Select the menu item Maxwell 2D Fields Fields B Mag_B

In Create Field Plot window,

Press Done